Answer with work pls

Use the elimination method to solve the system of equations -x+5y=-4 and 4x+3y=16

For the equations below which statement is true ? -2x=14 6x=-42

Boris needs to buy plastic spoons. brand a has a box 42 spoons for $2.37. brand b has a box of 72 spoons for $3.57. find the unit price for each brand. then state which brand is the better buy based on the unit price. round your answer to the nearest cent.